#include <Arduino.h>
#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h> // Include the ESP32 Servo library

const uint8_t I2C_ADDRESS = 0x27; 
const uint8_t LCD_CHARS = 16;
const uint8_t LCD_LINES = 2;

LiquidCrystal_I2C lcd(I2C_ADDRESS, LCD_CHARS, LCD_LINES);

const int potPin = 35;
const int potVccPin = 36; // 5V supply for potentiometer
const int servoPin = 21; // PWM-capable pin for servo control

// Servo motor properties
const int servoMinAngle = 0;
const int servoMaxAngle = 180;

unsigned int servoVal, angle;
ESP32Servo myservo; // Use ESP32Servo instead of Servo

void setup() 
{
  Serial.begin(115200); 

  // Initializing the potentiometer power supply
  pinMode(potVccPin, OUTPUT);
  digitalWrite(potVccPin, HIGH);

  // Initialize LCD
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.print("Output");
  lcd.setCursor(0, 1);
  lcd.print("Angle:  ");  // Two spaces for better alignment

  // Attach servo motor
  myservo.setPeriodHertz(50); // Set PWM frequency to 50Hz (standard for servos)
  myservo.attach(servoPin);
}

void loop() 
{
  servoVal = analogRead(potPin);  // Read potentiometer value (0-1023)

  // Map potentiometer value to servo angle range (0-180)
  angle = map(servoVal, 0, 1023, servoMinAngle, servoMaxAngle);

  // Update servo position only if there's a significant change (avoids jitter)
  if (abs(myservo.read()-angle)>=5) 
  {
    myservo.write(angle);
    lcdDisplay(angle);
  }

  delay(20);
}
void lcdDisplay(int currentAngle) 
{
  lcd.setCursor(7, 1);  // Set cursor to the second space after "Angle:"
  lcd.print("   ");     // Clear any previous angle value
  lcd.print(currentAngle);
  lcd.print((char)223);  // Degree symbol
}